Back-band buckle



(No Model.)

M. N. JUDD & A. MOMANU$.

BACK BAND BUCKLE.

Patented Jan. 18, 1898.

2% My 55 H7 Hid/755555 UNITED STATES PATENT EEicEi MORTIMER N. J AND ALONZO MCMANUS, OF NEW BRITAIN, CONNECTICUT.

BACK-BAND BUCKLE.

SPECIFICATION forming part of Letters Patent No. 597,501, dated January 18, 1898.

Application filed November 17, 1896. fierial No. 612,460. (No model.)

a portion of the web or back-band and tracechain. Fig. 2 is a sectional view of the same less the chain on. the line m a; of Fig. 1. Fig. 3 is a side elevation of the buckle detached from the web. Fig. 4 is a reverse plan view of said buckle. Fig. 5 is a front elevation with the buckle-tongue swung back and over, so as to show its grasping edge.

A designates one end of the web or backhand. Y

B is the buckle-frame, and O the tongue.

' The frame is provided with a web-holding back bar 6, havinga rib 7 near the upper edge of its bearing-face, a loop or slot 20 above said rib,two pivotal lugs or ears 8, castin the form of loops open at the rear to facilitate molding, the loop or slot 9, chain-hook 10, and inwardly-turned guard which is a continuation of the chain-hook and extends rearward to the plane of the buckle-frame back. The opening 21 in the buckle-frame back of and above the hook 10 is large enough to let a chain link pass endwise through it. The tongue is provided with a webgrasping wing 12, having a double row of teeth, which wing, when the tongue is closed, extends closely back to the front surface of the back bar 6 and nearly to the rib 7 thereof. Said tongue is also provided with a chain-holding flap 13 for shutting down over the chain-opening 21, above the guard 11, for confining the chain against accidental unfastening,and with trunnions 15, that enter the pivotal lugs or cars 8.

The buckle thus far described is a complete and operative one; but in order to secure what we call a double lock we form a cam projection 16 on the inside of each ear 8 for being engaged by the ends of the buckle'tongue. These projections are located with reference to the tongue, so that when the tongue is closed, as shown in Figs. 1 to 4, inclusive, the ends of the tongue stand just in front or under said projections and lock the tongue in its closed position. When the tongue is lifted or turnedback, the ends are carried to the rear of said projections, as shown in Fig. 5, the ears being sufficiently elastic to spring out as the laterally inelastic tongue is forced I by the projections and cause the tongue to snap into place as it passes the highest point of said projection in opening and closing.

In order to assemble the parts cheaply, the ears may be cast as if bent outwardly alittle from each other, and then afterinserting the tongue they can be forced toward each other to bring them intov the position shown to hold the tongue pivotally in place. e prefer to make the upper part of the front face of the holding-bar 6 substantially concentric to the axis of the tongue and to make the upper row of teeth on the grasping edge of the tongue shorter than the lower row,whereby the grip on the web maintains itself to the very last without any partial release or let up, as there would be if the grasping-face of the bar 6 were flat.

To attach the buckle and web, thelatter is passed through the slot 20 from the rear, over the rib 7, and between the web-holding back bar 6 and web-grasping wing 12, (the tongue being thrown back to bring the flap 13 to the front,) then through the loop 9, and down to the back of the frame. Turning the tongue down into the position shown in the figures preceding Fig. 5 will firmly secure the buckle on the web. Lifting the tongue in the same way by means of the flap 13,the trace-chain D can be put on or off the book 10, and then turning the tongue down when the chain is on the hook it will securely hold it therein. Any downward strain or pull on the buckle will draw the tongue firmly upon the web as held by the back bar and rib 7, and thereby said tongue and web serve as one look for securing the chain on the hook, while the proj ections or cams 16 also serve to hold the tongue in its closed position. Thus it will be seen that our buckle is provided with a donble lock. The rib 7 on the back bar not only forms a stop, but, in connection with the slot 20 of the frame, gives an offset form to the Web at that point to give afirmer hold. It is also very simple and efficient, being formed of only two principal parts and can be made at a small cost.

WVe claim as our invention- 1. A buckle comprising the frame having the web-holding back bar and a tongue pivoted on said frame, the front bearing-face of the said holding back bar being concentric to the axis of the said tongue and the said tongue having the double row of teeth with the upper row shorter than the lower row to make them concentric to said concentric face, substantially as described.

2. A buckle comprising the frame having Web-holding back bar and laterally elastic ears 8 with a cam projection 16 on the inside of each of said ears, and the laterally inelastic tongue provided with a toothed longitudinal edge that coacts .With the face of said Webholding back bar, said tongue being pivoted in said ears with its ends moving in a path to engage said cam projections and force the said ears outwardly in passing them, substantially as described. 7

3. The herein-described buckle comprising the frame having the web-holding back bar with a curved bearing-face and a stop-rib at the upper edge of said face, and having also the hook 10 with the guard 11, the end of which guard extends rea'rwardly to the plane of the buckle-frame back, and a tongue pivoted on said frame and having the Web-grasping wing With a double row of teeth actingin connection with said curved bearing-face and stop-rib, substantially as described.

MORTIMER N. JUDD. ALONZO MCMANUS.

WVitnesses:

H. O. NOBLE, N. E. J UDD. 

